HP 8591C Manuel d'utilisateur Page 194

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Vue de la page 193
I
-
Making Basic Measurements Using Spectrum Analyzer Mode
Identifying Distortion Products Using the RF Attenuator and Traces
If the responses in trace A and trace B differ, as in Figure 4-2
1,
then
attenuation is required. If there is no change in the signal level, the distortion
is not caused internally. For example, the signal amplitude in Figure 4-22 is
not high enough to cause internal distortion in the spectrum analyzer so any
distortion that is displayed is present on the input signal
LOG
*
10
I
I I
I I I I I I
SCALE
LOG
LIN
INT
AMP
ON
OFF
WA
“B
SC
FS
CORR
More
1
Of
2
I
CENTER
400.0
MHZ
SPAN
200.0
MHZ
RES
BW
1
.o
MHZ
“EW
300
kHZ
SWP
20.0
m!sec
Figure 4.22. No Harmonic Distortion
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